Thence walked with Creed to the Coffee-house in Covent Garden, where no company, but he told me many fine experiments at Gresham College; and some demonstration that the heat and cold of the weather do rarify and condense the very body of glasse, as in a bolt head' with cold water in it put into hot water, shall first by rarifying the glasse make the water sink, and then when the heat comes to the water makes that rise again, and then put into cold water makes the water by condensing the glass to rise, and then when the cold comes to the water makes it sink, which is very pretty and true, he saw it tried.
"Diary of Samuel Pepys, Complete Transcribed From The Shorthand Manuscript In The Pepysian Library Magdalene College Cambridge By The Rev. Mynors Bright"
Samuel Pepys Commentator: Lord Braybrooke
The air consequently was damp and gross, for want of stronger rays to open and rarify it.
"Plutarch-Lives-of-the-noble-Grecians-and-Romans"
Clough, Arthur Hugh